Machine for unhairing fur-skins.



0. DINGFELD.

MACHINE FOR UNHAIHING FUR SKINS.

APPLICATION FILED MAR. Il, 191B.

Patented Jan. 28, 1919.

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0. DINGFELD.

MACHINE FOR UNHMRING FUR SKINS.

APPLICATION FILED MAR. 11. |918.

1,292,726. Patented l131128,1919.

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OSCAR DINGFELD, OF BROOKLYN, NEW YORK.

MACHINE FOR UNI-IAIRING FUR-SKINS.

Specication of Letters latent.

Patented Jan. 28, 1919.

Application led March 11, 1918. Serial No. 221,732.

To all whom t may concern:

Be it known that I, OSCAR DINGFELD, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a new and useful Machine for Unhairing Fur-Skins, of which the following is a specification.

My invention consists in the novel features hereinafter more fully described, and it is an improvement on my machine for unhairing fur-skins, for which application for a patent was filed Jan. 7, 1918, Serial No. 210,761.

The objects of my improvement are:

First, to reduce the amount of lost motion of the cutting blades, and to counteract or reduce the effect of the looseness of the joints in the connections of saidblades to the machine.

Second, to reduce the floor space occupied by the machine.

Third, to simplify and reduce the cost of the transmission of power to the sundry parts of the machine.

Fourth, to make the machine, as a whole, simple, durable and inexpensive.

I attain these objects by the mechanisms illustrated in the accompanying drawings or byany mechanical equivalent or obvious modification of the same.

In the drawings Figure 1 is a view in vertical section of my machine for unhairing fur skins on the line A-B of Fig. 2, looking toward the right, and in a plane at right angles to the cutting blades and stretcher bar or bridge of the machine.

Fig.- 2 is a rear elevation of my machine or view looking toward the left in Fig. 1, and omitting the conveyer mechanism, the brushes and sundry other details for the sake of clearness.

Similar numerals and letters refer to similar parts throughout the two views.

11 designates the frame of the machine, at the lower end of which is mounted the shaft 12.

13 is one of a pair of oscillating arms, which are fiXedlv secured at their lower ends to said shaft 12, which may have a rocking motion imparted thereto by any suitable means such as the eccentric 33, which is shown as secured to the shaft or spindle 32, which is shown as supported by the brackets 11, which are made in one with the frame 11. Said shaft 32 is shown in Fig. 2 as having secured thereto the sprocket 44 which may be operatively connected to the sprocket 45 on said shaft 12 by means similar to the chain 46 hereinafter described. 35 is the eccentric strap, and 36 is the connecting rod shown as pivotally connected to one of `said arms 13 by means of the pin or stud 37.

14 is a shaft or spindle supported at the upper ends of said arms 13 and having the revolving members 15 secured thereto by means of the hubs 15u which coincide in Fig. 1 with the bearings or supports l5c at the ends of said shaft 14. Said members 15 terminate in a backing plate 15b for the outer cutting blade 16, which is adapted to revolve as indicated in Fig. 1 by the dotted circle, which is the path of the cutting edge with relation to said bearing 15c and in the direction of the arrows. It is evident that said outer cutting blade 16 may also oscillate on said shaft 14 instead of revolving thereon. Said backing plate 15b may be made in one with said members 15, as shown in Fig. 1, if desired.

Said arms 13 `have also secured thereto the backing plate 17 for the inner cutting blade 18 which may be connected thereto in any suitable way.

Said inner cutting blade 18 has imparted thereto an oscillating motion in a very fiat arc of a circle, thereby making room for the revolving and rocking brush 26, which is shown in Fig. 1 as pivotally connected at its ends to the pair of extensible pitmen 28--28a by means of the spindle 27; said brush is adapted to rise at every forward stroke of said inner cutting blade 18 and to pass over Y the top of the bridge or bar 19, which has the conveyer belt 20 pass thereover; said conveyer belt has secured thereto the fur skins, which are not shown in the drawings, and it is propelled by the rollers 21, 22, and 23, which are shown in Fig. 1 as secured to the shafts 38, 34 and 39 respectively; said shafts 38 and 39 are supported by said frame 11 and said shaft 34 by the bracket 11b made in one therewith.

24 is the revolving brush, which is shown in Fig. 1 as secured to the shaft 25, which is supported by the frame 11.

The motion of the revolving and rocking brush 26 is in part determined by the pair of links 29, which are shown in Fig. 1 as pivotally connected to the frame 11 by means of the pins 30 and to said extensible pitmen 28-28L by means of the pins 31.

40 is the combing bar shown in Fig. l and adapted to act in conjunction with said revolving and rocking brush 26, and 41 is one of a pair of rods supporting' the same. Said pitmen 28 28a and said rods 41 are shown in Fig. 1 as broken away for the sake of clearness.

The shaft 14 of the outer cuttingl blade 16 being also mounted on said arms 13, it is evident that the distance between the two blades will not be affected by the wear of the shaft 12 in its bearings, and the lost motion resul-ting therefrom. Said blade 18 is stationary with relation to the axis of revolution of said blade 16.

The construction above described also makes it very convenient for operatively connecting said shafts 12 and 14, as by means of a sprocket 43 on said shaft 12 and a corresponding sprocket 42 on the shaft 14, which sprockets may be connected by a suitable chain 46, as shown in F ig. 2, which is a source of economy in the building of the machine.

It is also evident that the floor space cccuH pied by this machine is materially less than that of a machine with a horizontally moving blade.

Many changes could be made in my fur unhairing machine within the scope of my' invention.

I do not therefore restrict myself to the details as shown in the drawings; but I in-l tend to include `also all mechanical equivalents and reasonably obvious modifications of the same.

Wherever the term oscillating is employed in the claims of this application it is meant to designate motion about a fixed point in an angular path, and it does not include rectilinear motion.

3. In a machine for unhairing fur skins an outer cutting` blade and an inner cutting blade, an oscillating carrier for said inner blade and a support for said outer blade, said support being stationary with relation to said carrier and said inner blade.

4. In a machine for unhairing fur skins yan outer cutting blade and an inner cutting blade, an oscillating carrier for said inner blade and a support for said outer blade said support being stationary with relation to said carrier, a spindle revolubly mounted on said support, said outer blade being secured to said spindle and adapted to move therewith on said support and angularly with relation to said carrier and said inner blade.

5. In a machine for unhairing fur skins a frame, a rockable shaft mounted at thie lower part of said frame, a pair of oscillating arms secured v.to said rockable shaft, an inner cutting blade connected to said arms, a support for said outer blade on said arms at the outer ends thereof, aspindle revolubly mounted on said support, said outer cutting blade being secured to said spindle and adapted to move therewith on said support and angularly with relation to said inner blade.

OSCAR DINGFELD.

Copies oi this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

